Corrugated paper thickness detection device and corrugated paper machine thereof

Abstract

The invention is suitable for the technical field of corrugated paper production equipment, and provides a corrugated paper thickness detection device. Comprising a rack; the multi-light-path optical detection module is fixedly installed on the rack and used for synchronously collecting surface height data of corrugated paper at different width positions; the optical displacement compensation unit is mounted on the rack, is arranged at the paper feeding end of the detection device, and is used for acquiring the transverse offset and the longitudinal vibration quantity of the corrugated paper in operation in real time and outputting a compensation signal; and the data processing unit is electrically connected with the multi-optical-path optical detection module and the optical displacement compensation unit, receives the height data of each laser displacement sensor, calculates the actual thickness of the corrugated paper through a preset algorithm, and outputs a thickness detection result. Through cooperation of the multi-light-path optical detection module and the optical displacement compensation unit, the problem that a traditional device is large in detection error due to transverse deviation of corrugated paper is solved.

Description

Technical Field

[0001] This invention relates to the field of corrugated paper production equipment technology, specifically a corrugated paper thickness detection device and its corrugated paper machine. Background Technology

[0002] Corrugated paper, as an important material in the packaging industry, directly affects the compressive strength and cushioning performance of products due to its uniform thickness. Traditional corrugated paper thickness measurement suffers from large errors in detecting lateral offset, making it difficult to meet the quality control requirements of modern high-speed production lines. To solve this technical problem, a corrugated paper thickness detection device and its corrugated paper machine are proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a corrugated paper thickness detection device and a corrugated paper machine to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A corrugated paper thickness detection device includes: a frame;

[0006] The multi-path optical inspection module is fixedly mounted on the frame and is used to simultaneously collect surface height data of corrugated paper at different width positions;

[0007] An optical displacement compensation unit is installed on the frame and located at the paper feed end of the detection device. It collects the lateral offset and longitudinal vibration of the corrugated paper in real time and outputs a compensation signal.

[0008] The data processing unit is electrically connected to the multi-path optical detection module and the optical displacement compensation unit, respectively. The data processing unit receives the height data of each laser displacement sensor, calculates the actual thickness of the corrugated paper through a preset algorithm, and outputs the thickness detection result.

[0009] As a further aspect of the present invention: the multi-path optical detection module includes at least one laser displacement sensor, each laser displacement sensor is evenly spaced along the direction perpendicular to the corrugated paper conveying direction, and the detection optical axis of each sensor is perpendicular to the surface of the corrugated paper.

[0010] As a further aspect of the present invention, it also includes an ambient light suppression component, integrated into the detection end of each optical displacement compensation unit, wherein the ambient light suppression component includes a narrowband filter and a light source calibration module.

[0011] As a further aspect of the present invention, the optical displacement compensation unit is a two-dimensional laser displacement sensor.

[0012] As a further embodiment of the present invention: the multi-path optical detection module may include a multi-wavelength optical emission module and a high-resolution CCD optical receiving module. The multi-wavelength optical emission module includes at least two laser emitters of different wavelengths. The high-resolution CCD optical receiving module is arranged opposite to the multi-wavelength optical emission module to synchronously receive laser signals reflected by different layers of corrugated paper and convert the optical signals into electrical signals.

[0013] To achieve the above objectives, the present invention provides another technical solution as follows:

[0014] A corrugated paper machine includes: a corrugated paper thickness detection device and a conveyor belt. The conveyor belt is installed on a frame, and a cleaning device is also installed on the frame, located above the conveyor belt. The cleaning device is positioned in the feeding direction of the corrugated paper thickness detection device, and is installed on the frame in a way that allows it to move up and down elastically. The conveyor belt is also provided with a power component that drives the cleaning device to move up and down elastically.

[0015] As a further embodiment of the present invention: the cleaning device includes a cleaning shaft, cleaning brushes, a cleaning motor, and a mounting frame; the mounting frame is elastically mounted on the frame, the cleaning shaft is mounted on the mounting frame, the axial direction of the mounting frame is perpendicular to the conveying direction of the conveyor belt, the cleaning motor is mounted on the mounting frame, the cleaning motor is connected to the mounting frame in a transmission manner, and the cleaning motor provides power for the rotation of the mounting frame; the cleaning brushes are arranged axially on the surface of the cleaning shaft.

[0016] As a further embodiment of the present invention: the cleaning shaft is hollow inside, and a number of narrow slits are arrayed on the surface of the cleaning shaft. The narrow slits extend along the axial direction of the cleaning shaft, and the cleaning brush is disposed between two adjacent narrow slits. One end of the cleaning shaft is externally connected to a negative pressure device.

[0017] As a further embodiment of the present invention: the conveyor belt includes a first conveyor roller, a conveyor belt and a second conveyor roller, the first conveyor roller and the second conveyor roller are rotatably mounted on the frame, and the conveyor belt is sleeved on the first conveyor roller and the second conveyor roller.

[0018] According to the claim 1, the power unit includes two transmission gears 1 installed at both ends of the second conveyor roller, each transmission gear 1 meshing with a transmission gear 2, the transmission gear 2 being rotatably mounted on the frame, the power unit also includes two synchronous discs, the synchronous discs being coaxial with the transmission gear 2, and an intermittent drive mechanism being provided between the synchronous discs and the mounting frame for driving the mounting frame to descend intermittently.

[0019] Compared with the prior art, the beneficial effects of the present invention are: by combining the multi-path optical detection module and the optical displacement compensation unit, the problem of large detection error due to the lateral offset of corrugated paper in traditional devices is solved. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a corrugated paper thickness detection device according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of corrugated paper according to an embodiment of the present invention. Figure 1 .

[0022] Figure 3 This is a schematic diagram of the structure of corrugated paper according to an embodiment of the present invention. Figure 2 .

[0023] Figure 4 This is a schematic diagram of the structure of a cleaning shaft in corrugated paper according to an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of a synchronization disk in corrugated paper according to an embodiment of the present invention. Figure 1 .

[0025] Figure 6 This is a schematic diagram of the structure of corrugated paper according to an embodiment of the present invention. Figure 3 .

[0026] Figure 7 This is a schematic diagram of the structure of a synchronization disk in corrugated paper according to an embodiment of the present invention. Figure 2 .

[0027] Figure 8 This is a schematic diagram of the structure of a drive rod in corrugated paper according to an embodiment of the present invention.

[0028] In the picture:

[0029] 10-Frame, 20-Multi-path optical detection module, 30-Optical displacement compensation unit, 40-Data processing unit, 50-Ambient light suppression component, 60-Conveyor belt, 70-Cleaning device, 80-Power unit, 90-Corrugated paper, 601-First conveyor roller, 602-Conveyor belt, 603-Second conveyor roller, 701-Cleaning shaft, 702-Cleaning brush, 703-Narrow slot, 704-Cleaning motor, 705-Mounting bracket, 706-Matching groove, 8 01-Transmission Gear 1, 802-Transmission Gear 2, 803-Synchronous Disc, 804-Drive Rod, 805-Central Shaft, 806-Intermediate Ring, 807-Outer Ring, 808-First Elastic Element, 809-Transmission Rod, 810-Abutting Protrusion, 811-Inner Shaft, 812-Collar, 813-Outer Rod, 814-Mounting Seat, 815-Round Rod, 816-Cam, 817-Support Rod, 818-Second Elastic Element, 819-Limiting Element, 820-Mounting Shaft. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] Please see Figure 1 The present invention provides a structural diagram of a corrugated paper thickness detection device according to Embodiment 1. The corrugated paper thickness detection device includes: a frame 10, a multi-path optical detection module 20, an optical displacement compensation unit 30, and a data processing unit 40. The multi-path optical detection module 20 is fixedly installed on the frame 10 and is used to synchronously collect surface height data of different width positions of the corrugated paper. The optical displacement compensation unit 30 is installed on the frame 10 and located at the paper feeding end of the detection device. It collects the lateral offset and longitudinal vibration of the corrugated paper in real time and outputs a compensation signal. The data processing unit 40 is electrically connected to the multi-path optical detection module 20 and the optical displacement compensation unit 30 respectively. The data processing unit 40 receives the height data of each laser displacement sensor, calculates the actual thickness of the corrugated paper through a preset algorithm, and outputs the thickness detection result.

[0033] This invention solves the problem of large detection error due to lateral offset of corrugated paper in traditional devices by using a multi-path optical detection module 20 and an optical displacement compensation unit 30.

[0034] In some embodiments, the preset algorithm may be a contour fitting algorithm based on the corrugated paper flute parameters.

[0035] In some embodiments, the multi-path optical detection module 20 includes at least three laser displacement sensors, each laser displacement sensor being evenly spaced along the direction perpendicular to the corrugated paper conveying direction, and the detection optical axis of each sensor being perpendicular to the surface of the corrugated paper.

[0036] This invention addresses the non-planar, high-speed dynamic conveying characteristics of corrugated paper by combining visual positioning compensation with multi-path optical detection and linking it to the closed-loop control of the corrugated rolls of the corrugated paper machine. This achieves integrated detection-feedback-adjustment, breaking through the technical bottleneck of traditional offline detection and manual adjustment, and has outstanding substantive features and significant progress.

[0037] In some embodiments, the optical displacement compensation unit 30 is a two-dimensional laser displacement sensor.

[0038] In some embodiments, the present invention further includes an ambient light suppression component 50, which is integrated into the detection end of each optical displacement compensation unit 30. The ambient light suppression component 50 includes a narrowband filter and a light source calibration module. The narrowband filter only allows the emitted light wavelength of the laser displacement sensor to pass through, and the light source calibration module calibrates the laser emission power in real time to counteract ambient stray light interference.

[0039] In some embodiments, the multi-path optical detection module 20 may include a multi-wavelength optical emission module and a high-resolution CCD optical receiving module. The multi-wavelength optical emission module includes at least two laser emitters of different wavelengths. The high-resolution CCD optical receiving module is arranged opposite to the multi-wavelength optical emission module and is used to synchronously receive laser signals reflected by different layers of corrugated paper and convert the optical signals into electrical signals. Both the multi-wavelength optical emission module and the high-resolution CCD optical receiving module are electrically connected to the data processing unit 40. Thus, the data processing unit 40 calculates the total thickness of the corrugated paper and the layer thickness of the face paper and core paper by the difference in reflection intensity of different wavelength lasers.

[0040] In some embodiments, the multi-wavelength optical emission module may include a 650nm laser emitter and an 808nm laser emitter. The output power of the 650nm laser emitter is 5-10mW, the output power of the 808nm laser emitter is 10-15mW, and the laser emission angle deviation between the two emitters does not exceed ±0.5°.

[0041] The present invention may also include a temperature compensation module, which is electrically connected to the data processing unit and is used to collect and detect the ambient temperature and correct the thickness calculation results according to the influence coefficient of temperature on laser wavelength.

[0042] Example 2

[0043] Existing technologies commonly suffer from measurement errors due to dust interference. Especially on high-speed production lines, residual paper scraps and dust on the cardboard surface directly affect the reading accuracy of laser sensors, causing fluctuations in the detection data. For example... Figure 2 As shown in Figure 3, this embodiment 2 of the present invention provides a corrugated paper machine. The corrugated paper machine includes a corrugated paper thickness detection device and a conveyor belt 60. The conveyor belt 60 is mounted on a frame 10, and a cleaning device 70 is also mounted on the frame 10, located above the conveyor belt 60. The cleaning device 70 is positioned in the feeding direction of the corrugated paper thickness detection device and is mounted on the frame 10 in a way that allows it to move up and down elastically. The conveyor belt 60 is also equipped with a power component 80 that drives the cleaning device 70 to move up and down elastically, for cleaning the surface of the corrugated paper 90. When the corrugated paper 90 passes the cleaning device 70, and its feeding end just barely passes the cleaning device 70, the power component 80 immediately drives the cleaning device 70 to move downwards, thereby thoroughly cleaning the surface of the corrugated paper 90. After cleaning, the power component 80 drives the cleaning device 70 to return to its initial position, and this process is repeated to clean each measuring position on the surface of the corrugated paper 90. This operation ensures that the subsequent corrugated paper thickness detection device can accurately measure it. If the cleaning device 70 touches the feed end of the corrugated paper 90, it may cause a large displacement. This avoids the corrugated paper 90 being displaced due to the cleaning device 70 touching the feed end, which would affect subsequent processes.

[0044] In this embodiment of the invention, the cleaning device 70 includes a cleaning shaft 701, a cleaning brush 702, a cleaning motor 704, and a mounting frame 705. The mounting frame 705 is elastically mounted vertically on the frame 10, and the cleaning shaft 701 is mounted on the mounting frame 705. The axial direction of the mounting frame 705 is perpendicular to the conveying direction of the conveyor belt 60. The cleaning motor 704 is mounted on the mounting frame 705 and is drively connected to the mounting frame 705, providing power for the rotation of the mounting frame 705. The cleaning brush 702 is arranged axially on the surface of the cleaning shaft 701. Thus, when the cleaning motor 704 drives the cleaning shaft 701 and the cleaning brush 702 on its surface to rotate and clean the surface of the corrugated paper 90, the rotation direction of the cleaning brush 702 is opposite to the conveying direction of the corrugated paper 90, forming relative friction and effectively removing paper scraps and dust adhering to the surface of the corrugated paper 90. The sweeping motor 704 is driven by a servo motor, which can adjust the speed of the sweeping shaft 701 in real time according to the conveying speed of the corrugated paper 90, ensuring the cleaning effect while avoiding excessive wear on the surface of the corrugated paper 90.

[0045] like Figure 4As shown in this embodiment of the invention, in order to improve the dust removal effect, the cleaning shaft 701 is hollow inside, and a plurality of narrow slits 703 are arrayed on the surface of the cleaning shaft 701. The narrow slits 703 extend along the axial direction of the cleaning shaft 701, and the cleaning brush 702 is disposed between two adjacent narrow slits 703. One end of the cleaning shaft 701 is externally connected to a negative pressure device to suck out the dust during the cleaning process, thereby improving the cleaning effect. The negative pressure device is connected to the interior of 701 through a flexible pipe. While 702 rotates and cleans, the negative pressure area formed by 703 can quickly adsorb the peeled paper scraps and dust, preventing secondary pollution.

[0046] In this embodiment of the invention, to further improve the cleanliness of the cleaning brush 702 surface, an ionizing rod (not shown in the figure) can also be provided on the frame 10. The ionizing rod is parallel to the cleaning shaft 701. Thus, when the cleaning shaft 701 approaches the ionizing rod, the ion wind generated by the ionizing rod can neutralize the static electricity generated on the surface of 701 due to friction, effectively preventing paper scraps and dust from being re-adsorbed. The ionizing rod maintains an appropriate distance from 701, which neither affects the normal rotation of 701 nor fails to ensure that the ion wind covers the entire cleaning area.

[0047] In other embodiments, the ionizing rod may also be mounted on the mounting bracket 705. The mounting position of the ionizing rod can be set as needed.

[0048] In this embodiment of the invention, the mounting bracket 705 can be mounted on the frame 10 via an elastic telescopic rod, thus achieving elastic mounting on the frame 10 from top to bottom.

[0049] like Figure 2 As shown, in this embodiment of the invention, the conveyor belt 60 includes a first conveyor roller 601, a conveyor belt 602, and a second conveyor roller 603. The first conveyor roller 601 and the second conveyor roller 603 are rotatably mounted on the frame 10, and the conveyor belt 602 is sleeved on the first conveyor roller 601 and the second conveyor roller 603. The conveyor belt 602 is made of wear-resistant rubber material, and its surface is provided with anti-slip texture to ensure stability during conveying. In order to drive the conveyor belt 602 to rotate, a conveyor motor for driving the first conveyor roller 601 to rotate is provided on the frame 10, and the conveyor motor is connected to the first conveyor roller 601 in a transmission connection.

[0050] like Figure 2 and Figure 3As shown, the power unit 80 includes two transmission gears 801 mounted at both ends of the second conveyor roller 603. Each transmission gear 801 meshes with a transmission gear 802. The transmission gear 802 is rotatably mounted on the frame 10. The power unit 80 also includes two synchronous discs 803, which are coaxial with the transmission gear 802. An intermittent drive mechanism is provided between the synchronous discs 803 and the mounting frame 705 to drive the mounting frame 705 to descend intermittently. During operation, the second conveyor roller 603 drives the transmission gear 801 to rotate, which in turn drives the transmission gear 802 to rotate. The transmission gear 802, through the synchronous discs 803 and the intermittent drive mechanism, drives the mounting frame 705 to move up and down periodically, achieving intermittent contact between the cleaning roller and the surface of the corrugated paper 90. This allows the frequency of the mounting frame 705's up and down movement to be automatically adjusted according to the conveying speed of the corrugated paper 90, ensuring precise matching between the cleaning frequency and the conveying speed.

[0051] like Figure 3 and 5As shown, in some embodiments of the present invention, the intermittent drive mechanism includes a mating groove 706 disposed on one side wall of the mounting bracket 705, and the synchronous disc 803 includes a drive rod 804, a central shaft 805, an intermediate ring 806, and an outer ring 807; the central shaft 805 is concentric with the transmission gear 802, the intermediate ring 806 is elastically rotatably sleeved on the outside of the central shaft 805, the outer ring 807 is rotatably sleeved on the outside of the central shaft 805, and a plurality of transmission rods 809 are arranged in an array on the outside of the intermediate ring 806, one end of each transmission rod 809 being rotatably sleeved on... A first pin is fixedly mounted on a central shaft 805. A torsion spring is sleeved on the outside of the first pin, and the two ends of the torsion spring are respectively fixedly mounted on the first pin and the transmission rod 809. Thus, the transmission rod 809 is elastically rotated and mounted on an intermediate ring 806. An abutting protrusion 810 is provided on the inner side of the outer ring 807. The abutting protrusion 810 is located on the trajectory of the transmission rod 809 away from the first pin. A driving rod 804 is provided on the outer side of the outer ring 807. The driving rod 804 is located in a mating groove 706. Specifically, during operation, when 802 drives 805 to rotate, when one of the transmission rods 809 passes the abutment protrusion 810, the transmission rod 809, under the action of the torsion spring, drives the intermediate ring 806 to drive the drive rod 804 to move the mounting frame 705 downward to the cleaning position. This causes the cleaning shaft 701 on the mounting frame 705 to clean the middle position of the corrugated paper 90. During the cleaning process, the central shaft 805 continues to rotate with the transmission gear 802. Under the action of the driving force, a relative offset is generated between the intermediate ring 806 and the central shaft 805, so that the rotation of the central shaft 805 is not restricted. When the cleaning shaft 701 finishes cleaning, the transmission rod 809 that abuts the abutment protrusion 810 overcomes the resistance of the torsion spring and deflects, filtering past the abutment protrusion 810. This process is repeated, and the next transmission rod 809 will also touch the abutment protrusion 810 again, thus cleaning the next corrugated paper 90. This ingenious linkage design allows the sweeping shaft 701 to automatically adjust the sweeping frequency according to the material conveying speed, avoiding excessive wear while ensuring cleaning effectiveness. The elastic deformation characteristics of the torsion spring allow the drive rod 809 to generate instantaneous driving force when it contacts the abutment protrusion 810, and then quickly return to its original position, preparing for the next sweeping action.

[0052] A plurality of first elastic elements 808 are provided between the central shaft 805 and the intermediate ring 806, with both ends of the first elastic elements 808 fixedly mounted on the central shaft 805 and the intermediate ring 806, respectively. This allows the intermediate ring 806 to be elastically rotated and mounted on the central shaft 805. The elastic connection design of 808 allows 806 to generate a slight angular displacement when blocked by 810, while the elastic potential energy stored by the torsion spring ensures rapid reset after the cleaning action is completed. This precision mechanical structure effectively reduces rigid impact between components and extends the service life of the equipment. The first elastic element 808 can be a helical spring, and other types of elastic elements can be selected as needed.

[0053] like Figure 6 , Figure 7 and Figure 8As shown, in some other embodiments of the present invention, the intermittent drive mechanism includes a mating groove 706 disposed on one side wall of the mounting bracket 705, the mating groove 706 being strip-shaped; the synchronous disk 803 may include an inner shaft 811 and a collar 812, the collar 812 being elastically rotatably sleeved on the outside of the inner shaft 811, a plurality of drive rods 804 being arrayed on the collar 812, each drive rod 804 including an outer rod 813 and a mounting base 814, the outer rod 813 being elastically sleeved on the mounting base 814, and a mounting shaft 820 being fixedly mounted on the mounting base 814, the mounting shaft 820 passing through the mounting base 814. 14. The mounting shaft 820 is set in the mounting groove inside the collar 812. Both ends of the mounting shaft 820 are fixedly installed on the side wall of the mounting groove. Both sides of the outer rod 813 are equipped with round rods 815. The round rods 815 abut against the protrusion of the cam 816. The cam 816 is elastically rotated and sleeved on the mounting shaft 820. The mounting shaft 820 is also provided with a support rod 817. The support rod 817 can be arranged radially. Several limiting members 819 are arranged in an array on the outer side of the inner shaft 811. The limiting members 819 are set on the trajectory of the support rod 817. The mating groove 706 is set on the trajectory of the outer rod 813. During operation, the inner shaft 811 rotates with the transmission gear 802, driving the collar 812 to rotate. When a piece of corrugated paper 90 is conveyed to the area below the cleaning shaft 701, one of the outer rods 813 enters the mating groove 706. Under the action of the inner shaft 811, the outer rod 813 drives the mating groove 706, causing the mounting frame 705 and the cleaning shaft 701 to move downwards to clean the surface of the corrugated paper 90. When the mounting frame 705 descends to its lowest position, the outer rod 813 can no longer descend. At this point, the inner shaft 811... The rotation continues, causing relative rotation between the collar 812 and the inner shaft 811. At this time, the cleaning shaft 701 cleans the surface of the corrugated paper 90. After cleaning, the support rod 817 abuts against the adjacent limiting member 819, causing the cam 816 to slide relative to the round rod 815. Under the action of elastic force, the round rod 815 retracts towards the mounting base 814, causing the outer rod 813 to disengage from the mating groove 706, releasing the low-position restriction of the mounting bracket 705. The mounting bracket 705 automatically returns to its initial position under its own elastic force. The precise cooperation of 817 and 819 ensures that the timing of 813 disengaging from 706 is just right, and the elastic retraction of 815 ensures smooth disengagement while avoiding hard collisions between components. This ensures that each piece of corrugated paper 90 is accurately cleaned as it passes through the cleaning shaft 701.

[0054] In some embodiments of the present invention, a torsion spring may also be provided between the mounting shaft 820 and the cam 816, thereby elastically rotatably mounting the cam 816 on the 820. The preload of the torsion spring ensures that the cam 816 always tends to rotate in the direction of the cam 815. When the cams 817 and 819 separate, the restoring force of the torsion spring will cause the cam 816 to quickly return to its original position, ensuring that the cam 815 can return to its working position in a timely manner. When the round rod 815 abuts against the protrusion of the cam 816, the outer rod 813 is at its outermost end.

[0055] In some embodiments of the present invention, a third elastic element is further provided between the outer rod 813 and the mounting base 814. The two ends of the third elastic element are respectively fixedly installed on the outer rod 813 and the mounting base 814, so that the outer rod 813 is elastically sleeved on the mounting base 814. The outer rod 813 can extend and retract along the radial direction of the inner shaft 811.

[0056] In some embodiments of the present invention, a second elastic element 818 is further provided between the inner shaft 811 and the collar 812. The two ends of the second elastic element 818 are respectively fixedly installed on the inner shaft 811 and the collar 812. The 818 is made of high-strength spring steel, and its elastic coefficient is precisely calculated so that it can provide a stable buffering force when the 812 and 811 rotate relative to each other.

[0057] In some embodiments of the present invention, the collar 812 may be composed of two parallel annular plates, and the two annular plates are fixedly mounted between the two annular plates by a connecting rod. The mounting base 814 is disposed between the two annular plates.

[0058] This invention provides a high-precision, high-reliability corrugated paper thickness detection device and its corrugated paper machine. Through multi-path optical detection, optical displacement compensation, ambient light suppression, and the coordinated design of a cleaning device and an intermittent drive mechanism, it successfully overcomes the technical bottlenecks of traditional detection devices. This device possesses outstanding substantive features and significant advancements, making it suitable for online detection and quality control in the corrugated paper production process.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A corrugated paper thickness detection device, characterized in that, include: frame; The multi-path optical inspection module is fixedly mounted on the frame and is used to simultaneously collect surface height data of corrugated paper at different width positions; An optical displacement compensation unit is installed on the frame and located at the paper feed end of the detection device. It collects the lateral offset and longitudinal vibration of the corrugated paper in real time and outputs a compensation signal. The data processing unit is electrically connected to the multi-path optical detection module and the optical displacement compensation unit, respectively. The data processing unit receives the height data of each laser displacement sensor, calculates the actual thickness of the corrugated paper through a preset algorithm, and outputs the thickness detection result.

2. The corrugated paper thickness detection device according to claim 1, characterized in that, The multi-path optical detection module includes at least one laser displacement sensor, which is evenly spaced along the direction perpendicular to the corrugated paper conveying direction, and the detection optical axis of each sensor is perpendicular to the surface of the corrugated paper.

3. The corrugated paper thickness detection device according to claim 2, characterized in that, It also includes an ambient light suppression component, which is integrated into the detection end of each optical displacement compensation unit. The ambient light suppression component includes a narrowband filter and a light source calibration module.

4. The corrugated paper thickness detection device according to claim 3, characterized in that, The optical displacement compensation unit is a two-dimensional laser displacement sensor.

5. The corrugated paper thickness detection device according to claim 1, characterized in that, The multi-path optical detection module includes a multi-wavelength optical emission module and a high-resolution CCD optical receiving module. The multi-wavelength optical emission module contains at least two laser emitters of different wavelengths. The high-resolution CCD optical receiving module is arranged opposite to the multi-wavelength optical emission module and is used to synchronously receive laser signals reflected by different layers of corrugated paper and convert the optical signals into electrical signals.

6. A corrugated paper machine, characterized in that, The corrugated paper machine includes: a corrugated paper thickness detection device and a conveyor belt as described in any one of claims 1-5. The conveyor belt is installed on the frame, and a cleaning device is also installed on the frame. The cleaning device is located above the conveyor belt. The cleaning device is arranged in the feeding direction of the corrugated paper thickness detection device, and the cleaning device is installed on the frame in a way that allows it to move up and down elastically. The conveyor belt is also provided with a power component that drives the cleaning device to move up and down elastically.

7. A corrugated paper machine according to claim 6, characterized in that, The cleaning device includes a cleaning shaft, cleaning brushes, a cleaning motor, and a mounting frame. The mounting frame is elastically mounted on the machine frame, the cleaning shaft is mounted on the mounting frame, the axial direction of the mounting frame is perpendicular to the conveying direction of the conveyor belt, the cleaning motor is mounted on the mounting frame, the cleaning motor is connected to the mounting frame in a transmission manner, and the cleaning motor provides power for the rotation of the mounting frame. The cleaning brushes are arranged axially on the surface of the cleaning shaft.

8. A corrugated paper machine according to claim 7, characterized in that, The cleaning shaft is hollow inside, and a number of narrow slits are arrayed on the surface of the cleaning shaft. The narrow slits extend along the axial direction of the cleaning shaft. The cleaning brush is disposed between two adjacent narrow slits. One end of the cleaning shaft is connected to a negative pressure device.

9. A corrugated paper machine according to claim 8, characterized in that, The conveyor belt includes a first conveyor roller, a conveyor belt, and a second conveyor roller. The first and second conveyor rollers are rotatably mounted on the frame, and the conveyor belt is sleeved on the first and second conveyor rollers.

10. A corrugated paper machine according to claim 9, characterized in that, The power unit includes two transmission gears 1 installed at both ends of the second conveyor roller. Each transmission gear 1 meshes with a transmission gear 2. The transmission gear 2 is rotatably mounted on the frame. The power unit also includes two synchronous discs. The synchronous discs are coaxial with the transmission gear 2. An intermittent drive mechanism is provided between the synchronous discs and the mounting frame to drive the mounting frame to descend intermittently.

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